@mixin my_gradient($leftColor, $rightColor,$bottomColor) {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0) 50px, rgba(255, 255, 255, 0.5) 300rpx, $bottomColor 800rpx), linear-gradient(90deg, $leftColor 0%, $rightColor 100%);
}